单选题I would have gone to

单选题 I would have gone to visit him in the hospital had it been at all possible, but I_______ fully occupied the whole of last week.A.wereB.had beenC.have beenD.was

D解析考查时态。I would have gone to visit him in the hospital had it been at all possible是含有虚拟语气的句子；but I_______ fully occupied the whole of last week.是真实的情况，要用陈述语气，再根据时间状语last week，可知要用一般过去式。所以选D。

这个解释是对的